22012002021 has 8 divisors (see below), whose sum is σ = 29355089920. Its totient is φ = 14671791072.

The previous prime is 22012002013. The next prime is 22012002031. The reversal of 22012002021 is 12020021022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22012002021 - 2³ = 22012002013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012001988 and 22012002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012002031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701320 + ... + 732033.

It is an arithmetic number, because the mean of its divisors is an integer number (3669386240).

Almost surely, 2^22012002021 is an apocalyptic number.

It is an amenable number.

22012002021 is a deficient number, since it is larger than the sum of its proper divisors (7343087899).

22012002021 is a wasteful number, since it uses less digits than its factorization.

22012002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438475.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22012002021 its reverse (12020021022), we get a palindrome (34032023043).

The spelling of 22012002021 in words is "twenty-two billion, twelve million, two thousand, twenty-one".